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Re: [Question #698984]: How do I keep a circle of particles around a circle motionless?
Question #698984 on Yade changed:
Status: Open => Answered
Jan Stránský proposed the following answer:
please read .
Next time, try to make the question standalone. If it is related to another question, please at least reference it, e.g. here it is .
The questions and answers are there also for others, who may search them in future and find their answers.
As such, the question "How do I keep a circle of particles around a circle motionless?" makes no sense.
To keep one particle "b" motionless, block all its degrees of freedom:
b.state.blockedDOFs = "xyzXYZ" # [3,4]
To select relevant particles, use similar code as proposed in 
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